Shaft-coupling.



' }.J. L. G. RAHD'BR'. I SHAFT courum "APPLICATION mum mum, 1910.

Patented Jan. 24. 1911.

J. L. G. RAHDER.

SHAFT COUPLING. APPLICATION FILED HA3; 5. 1910.

Patentd Jan.24,19 11.

a sums-3mm 2.

J. L, G/R'AHDER. SHAFT 0011mm.

APPLIOATION FILED MAB. 5, 19 10.

Patented Jan 24, 1911.

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JEAN LOUIS GililB-l-XRD EAHDER, OF DUSSELDORF, GERMANY.

SHAFT-COUPLING.

Application filed March 5, 1916.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, JEAN LOUIS Gn'mno RAHDER, a citizen of the Netherlands, and residing at Dusseldorf, Germany, have in vented new and useful Improvements in Shaft-Couplings, of which the following is a specification.

This invention relates to a hydraulic shaft-coupling of novel construction and comprises more particularlynovel and etlective means for controlling the flow of the power transmitting liquid and for preventing leakage. i

In the accompanying drawings: Figure 1 is a side view of my improved shaft-coupling; Fig. 2 a cross section on line A-li, Fig. 1; Fig. 3 a horizontal section on line CD, Rig. 2; Fig. t a longitudinal section on line E F, F 5, illustrating a modification of tie coupling; Fig. 5 a side view 1 thereof; Fig. 6 a detail of one of the conical sleeves and cooperating parts, and Fig. 7 a detail of part of the wedge-carrier.

The shaft Z) to be coupled to the driver shaft a is provided with a pair of crank pins 0, (Z arranged out of axial alinement with each other. These pins carry rotatable members e, having at both extremities arms 9,71, pivoted thereto, which engage slots of a grippendisk 7c of the shaft (4. Consequently, on turning this shaft, the members a, f are'taken along with the arms 5/, 72. in which operation, however, they can move inward and outward, corresponding to the eccentricity of the crank pins. The arrangement is siich a. one that the members 0, are always shifted in opposite directions. The g, it engaging the slots 1 carry lateral piston-like extensions Z, with which they pass up into chambers or slots 2". T he extensions Z are cuneifori'n and. the slots have this shape as well, as shown in Fig. t). The cha abers or guide-slots of two adjacent disks are connected by ducts m, 7 2., the corn trally disposed ducts in opening into junctional ducts 11 provided in the shaft (1.. The ducts m are filled a supply-pipe arranged in the shaft (4 and the filling of the ducts it takes, place by a supply-pipe provided on the outside of the gripper-disk. For fillingwater or another liquid may be used. In this manner both sides of the pistons Z are sur rounded with liquid within the chambers 2". .[i' on the rotation of the-shaft a the member G fW5ltl1 the g and the piston is moved inwardly, the member f with the arm 71- and the pistons is moved outwardly, and consequently the water displaced by that piston can escape into the space voided by this piston. If, however, by turning the plug 0 of the cock arranged in the shaft a the pass sage from the one duct tothe other is interrupted, the water can no longer be dis placed; thus checking the movement of members 6, in this manner the same are stabilized on their crank pins, so as to trans: mit rotary movement from shaft 6/. to shaft Z). As shaft (,1. is rotated in the direction of the arrow, the gripper-disk I; with the cuneiform faces of their slots 2" is being pressed close to the cuneiform faces of the pistons Z,

and its faces 70 bear agains he arms 1, ll. Thus the chambers or slo... z" are kept tightly closed on all sides so as to prevent any liquid from leaking out. of the chamber outwardly intermediate the faces. of the gripper-disk Jr. limiting the slots i and the arms g, h. The packing of the arms 9 and 72. is effected automatically during the operation without any stuiling boxes being necessary as in the known couplings of the same class. Likewise no danger exists or its getting leaky by wear and tear as during service the gripper-disk 7c is always pressed against arms y, 7/. thus insuring a tight fit of the parts.

In the modification shown in theFigs.

l to 6 the cranks c, 0? arranged eccentrically relative to the shaftand to each other have a conical form and. the members, carried thereby and fitted with the pistons, consist of two parts. The cranks 0, (Z are encompassed by tapering sleeves g, h, provided with cuneiform recesses e. The latter are engaged by triangular keys of a pair of disksg fi and the piston-shaped extensions Z, laterally projecting in these recesses. The shaft :5 has placed thereon the carrier-bodies 7a which pass up with the arms K1 as shown in Fig. 7, intermediate the disks g and if and into the recesses j. The arms t have slots 8, with which they embrace the pistons Z.

In Fig. 7 the body 70 with the ar n-Zc is drawn in such a way that it mu ,be turned in horizontal direction throrrgl'i 180 These disks have recessescj.

to permit. its bein pushed into the'recesses j and with the slots over the piston Z. It has been represented in this way in order to show the slot 8. The piston Z and the slot are kept in cuneiform engagement. The

slots 8 are connected by means of ducts t fit to be closed by-plugs a. On the rotation of the shaft a the member 7: assisted by the arms takes along the .disksg and h and sleeves g, it, thereby reciprocatingthe pistons Z in slots 2' corresponding to the eccentricity of the pivots. In order that, when the shift takes place, the disks 9 and it may not jam With the parts overlapping the arms 72 these special parts, provided with the recesses j are so inserted into the disks 9 and h respectively, as to allow their rotation conveniently. If by closing the plugs u the water contained in the slots 01'' chainbers s is prevented from escaping, the parts 9, g and h, 723 are clamped to the cranks, thereby effecting the rotation of the shaft Z). The shaft a rotates in the direction of the arrow; so that the faces 8 placed laterally and above the slots 8 are pressed close to the faces Z arranged by the side of the piston. In this Way the slots 8 are closed on all sides tightly and no liquid can come away outwardly intermediate the faces 8 and Z.

If a shift of the sleeves g and it, carried by the cuneiform cranks, takes place, they are forced outwardly by means of the disks 9 and h This is efiected by their being slightly twisted relative to the sleeves and their being pushed with one surface 1; of their cuneiform extensions past the faces a" of the recesses a. In this way the adjustment of the parts is effected automatically When they Wear away and consequently their slackening relative to one another and to thepivots c, d cannot occur.

In place of being cuneiform, the pistons Z and the chambers z" and s respectively may also be shaped rectangular, circular or the like. It is only necessary that. during the operation the'faces provided laterally and above and below the slots are pressed close to the faces arranged around the pistons.

When one of the shafts is fixed in' position, the contrivance may also be used as a brake; for, on closing the ducts the other "shaft is stopped up aswell or, if the ducts .are only partly closed, its movement is checked. By shutting off only partly the passage-ducts also the second shaft can be permanently actuated at a lesser speed front the driven shaft. I

I claim 1. In a liquid-controlled; shaft coupling, a head carried by thedriver shaft and havadjoining slots, a pair of crank pins on the driven shaft, arms operatively connected to the crank pins and engaging said slots, and pistons on said arms that engage the chambers.

2. In a liquid-controlled shaft coupling, a head carried by the driver shaft and having a pair of communicable chambers which are provided with cuneiform sides, a pair of crank pins on the driven shaft, and cuneiform pistons operably connected to the crank pins and adapted to be pressed liquid-tight against the cuneiform chamber-sides upon a rotation of the head.

3. In a liquid-controlled shaft coupling, a head carried by the driver shaft and having a pair of chambers which are provided With cuneiform sides, a duct connecting said chambers, a valve plug controlling said duct, a pair of crank pins on the driven shaft, and cuneiform pistons operably connected to the crank pins and adapted to be pressed against the cuneiform chamber sides upon a rotation of the head. v

4. In a liquid-controlled shaft coupling, a head carried by the driver shaft and hav ng a pair of communicable tapering chambers and adjoining oblong slots, the Width of said slots exceeding that of the base of the tapering chambers whereby straight faces are crank pins on the drivenshaft, arms of oblong cross section operatively connected to said pins and engaging the slots, and tapering pistons on said arms, that engage the chambers, the arms and pistons being adapted to be pressed against the slot-faces and the chamber-sides respectively upon a rotation of the head.

J. L. GERARD RAHDER. a. s]

Witnesses O'r'ro Konie, CHAS. J. Wafer-1T.

ing a pair of communicable chambers andformed that flank the chambers, a. pair of 

